Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
  • C07F7/22—Tin compounds
  • C07F7/2208—Compounds having tin linked only to carbon, hydrogen and/or halogen
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
  • C07F7/22—Tin compounds
  • C07F7/2284—Compounds with one or more Sn-N linkages

Definitions

• This invention belongs to the field of organotin chemistry, and, in particular, relates to a facile process for preparing certain organotin intermediates.
• Background [0002] Certain organotin compounds have been shown to be useful in the deposition of highly pure tin (IV) oxide in applications such as extreme ultraviolet (EUV) lithography techniques used in the manufacture of certain microelectronic devices.
• EUV extreme ultraviolet
• organotin compounds having a combination of alkylamino groups (or alkoxy groups) and alkyl groups which are useful as liquid precursors in the deposition of tin-containing films onto microelectronic device substrates.
• the process of the invention can be used to prepare isopropyltriphenyl tin, which can then be reacted with tin tetrachloride, followed by dimethylamine and lithium dimethylamide, to afford tris(dimethylamido)isopropyl tin.
• Figure 1 is a 1 H-NMR of the Ph3Sn-iPr (isopropyl triphenyl tin) of Example 1, recorded in CDCl3.
• Figure 2 is a 119 Sn-NMR of the Ph 3 Sn-iPr of Example 1, recorded in CDCl 3 .
• Figure 3 is a 119 Sn-NMR of the iPrSnI3 of Example 2, recorded in 2-Iodopropane.
• the singular forms “a”, “an”, and “the” include plural referents unless the content clearly dictates otherwise.
• the term “or” is generally employed in its sense including “and/or” unless the content clearly dictates otherwise.
• the term “about” generally refers to a range of numbers that is considered equivalent to the recited value (e.g., having the same function or result). In many instances, the term “about” may include numbers that are rounded to the nearest significant figure.
• the present disclosure provides a process for preparing a compound of Formula (I): (Q)3SnR (I), wherein Q is chosen from (a) phenyl, (b) a group of the formula (C1-C12 alkyl)2N-, (c) a group of the formula (C 1 -C 12 alkyl-O)-; and (d) a halide (F, Cl, Br, I) and wherein R is a C1-C12 alkyl group, the process comprising combining a compound of the formula SnX2, wherein X is chosen from fluoro, chloro, bromo, and iodo, with a molar excess of a compound of the formula Q- M, wherein M is chosen from Li, Na, and K,
• Q is chosen from (a), (b), or (c).
• the compound of the formula Q-M is generally added slowly (while controlling the resulting exothermic reaction) to a reaction mixture comprising a dihalo tin compound (SnX 2 ) and an aprotic solvent, for example an ether such as tetrahydrofuran, diethyl ether, di-n-butyl ether, dimethoxyethane, and the like to form a compound of the formula Q3SnM.
• a molar excess of the compound of the formula Q-M is utilized, based on the starting amount of the compound of the formula SnX2.
• the reaction mixture can be heated to a temperature above ambient temperature, for example about 40°C to 80°C, or about 55°C to 65°C, for a period of time sufficient to ensure complete reaction of these two species.
• a generally equimolar amount of a compound of the formula R-X is added to the reaction mixture, which then affords the desired product of Formula (I).
• the compound of the formula R-X is added in about 0.7 to about 1.3 molar equivalents, such as about 0.8 to about 1.2 molar equivalents or about 0.9 to about 1.1 molar equivalents, based on the amount of starting material of the formula SnX2.
• Q is chosen from (d).
• a compound of the formula Q-M is added to a dihalo tin compound (SnX2) in a ratio of from 1.2:1 to 1:1.2, such as a ratio of from 1.1:1 to 1:1.2, and preferably in a 1:1 ratio, wherein Q is a halide.
• the reaction mixture can be heated to a temperature above ambient temperature, for example about 180°C to 220°C, for a period of time sufficient to ensure complete reaction to form a compound having the formula Q3SnM.
• a general excess of R-X is added to the reaction mixture.
• the reaction mixture can be heated to a temperature above ambient temperature, for example about 90°C to 140°C, for a period of time sufficient to ensure complete reaction of these species, which then affords the desired product of Formula (I), wherein Q is a halide.
• the compound of the formula R-X is added in about 4 to about 8 molar equivalents, based on the amount of starting material of the formula SnX2.
• R can be chosen from C 1 -C 12 alkyl groups, which can be straight or branched-chain alkyl groups such as methyl, ethyl, propyl, butyl, isopropyl, isobutyl, sec- butyl, etc.
• R can be a cyclic C 1 -C 5 group such as a cyclopropyl group.
• R may be an unsaturated C 1 -C 5 group such as a vinyl group or an acetylenyl group.
• R may be an alkylether group, wherein the alkyl portion is a C 1 -C 5 alkyl group.
• X is chosen from chloro or bromo.
• the reactant of the formula R-X in one embodiment, can be 2-bromopropane or 2-chloropropane.
• Compounds of Formula (I), such as wherein Q is phenyl, a group of the formula (C 1 - C12 alkyl)2N-, or a group of the formula C 1 -C 12 alkyl-O-, are useful as intermediates in the synthesis of certain dialkylamido organotin precursor compounds, which compounds are useful in the vapor deposition of tin-containing films onto a surface of a microelectronic device.
• the compound of Formula (I) is isopropyl triphenyltin.
• the invention provides a process for preparing a compound of the formula , wherein R 1 is C 1 -C 6 alkyl, which comprises contacting a compound of the formula SnX 2 , wherein X is chloro or bromo, with a molar excess of a compound of the formula (Ph)Li, wherein Ph is phenyl, followed by addition of a compound of the formula R 1 X.
• R 1 is isopropyl and X is chloro.
• the compounds of Formula (I), such as wherein Q is phenyl, a group of the formula (C 1 -C 12 alkyl)2N-, a group of the formula C 1 -C 12 alkyl-O-, or a halide such as F, Cl, Br, or I, are useful as intermediates in the formation of dialkylamido alkyl tin compounds.
• the disclosure provides a process for preparing a compound of Formula (II): (II), wherein R is a C 1 -C 12 alkyl group and R 2 is a C 1 -C 12 alkyl group, which comprises (a) contacting a compound of the formula SnX 2 , wherein X is chosen from fluoro, chloro, bromo, and iodo, with a molar excess of a compound of the formula Q-M, wherein M is chosen from Li, Na, and K, and Q is phenyl, a group of the formula (C 1 -C 12 alkyl)2N-, or a group of the formula C 1 -C 12 alkyl-O-, (b) adding a compound of the formula R-X, wherein R is a C 1 -C 12 alkyl group, to afford a compound of the formula (Q)3SnR, (c) reacting with a tin (IV) halide to afford an
• steps (a) and (b) are analogous to those recited above in the first aspect.
• a compound such as [phenyl]3Sn-[isopropyl] may be formed by combining a tin (II) dihalide, such as SnCl 2 , and (Ph)Li, and further combining with an isopropyl halide.
• the resulting [phenyl]3Sn-[isopropyl] may be further reacted with a tin (IV) halide such as SnCl 4 , to afford a trihalotin intermediate, such as isopropyltin trichloride, which can then be reacted with a dialkylamine of the formula (R 2 ) 2 NH, such as dimethylamine, and a compound of the formula (R 2 )2N-M, such as lithium dimethylamide, to provide a compound of the Formula (IIa): [0020]
• the disclosure also provides a process for preparing a compound of Formula (II), wherein R is a C 1 -C 12 alkyl group and R 2 is a C 1 -C 12 alkyl group, which comprises (a) contacting a compound of the formula SnX2, wherein X is chosen from fluoro, chloro, bromo, and iodo, with a compound of the formula Q-M, wherein
• an alkyl tin trihalide such as isopropyl tin trichloride
• M-X metal halide
• SnX2 tin (II) halide
• R- X alkyl halide
• Q 3 SnR such as [chloro]3Sn-[isopropyl].
• Q is a group of the formula (C 1 -C 4 alkyl) 2 N-, and is chosen from groups of the formulae: a. (CH3)2N- ; b. (CH 3 CH 2 ) 2 N- ; c. (n-propyl)2N- ; d. (isopropyl)2N- ; e. (tert-butyl) 2 N- ; f.
• R is a group of the formula C 1 -C 4 alkyl-O-, and is chosen from groups of the formulae: a. CH3O- ; b. CH3CH2O- ; a. n-propyl-O- ; b. isopropyl-O- ; c. tert-butyl-O- ; d. sec-butyl-O- ; and e. n-butyl-O- .
• the solvent was removed from the reaction under reduced pressure and the resulting tacky yellow mixture was brought out of the glovebox and placed in a fume hood.
• the product was dissolved in dichloromethane ( ⁇ 50 mL) and washed with DI H 2 O (3 x 100 mL) in a separatory funnel. After the third water washing, the combined organic layers were dried with MgSO4, filtered through a disposable polyethylene filter frit, and the resulting peach/yellow solution dried under reduced pressure to yield a pale yellow solid: 20.2g (65.7%).
• Example 2 Synthesis of isopropylTin triiodide (iPrSnI3) [0027]
• KCl (1.93g, 26.0 mmol) and SnCl2 (5g, 26.0 mmol) were combined in a 40 mL vial equipped with a magnetic stir bar and heated at 195 °C, whereby, after heating for one hour the reaction presented as a light-yellow liquid.
• the mixture was cooled to room temperature, solidifying into a white solid.
• 2-iodopropane (26.5g, 156 mmol) was added to the reaction and the mixture stirred at 125°C for 12 hours, at which time, the reaction presented as a yellow/orange mixture.
• the disclosure provides a process for preparing a compound of Formula (I): (Q) 3 SnR (I), wherein Q is chosen from (a) phenyl, (b) a group of the formula (C 1 -C 12 alkyl)2N-, (c) a group of the formula C 1 -C 12 alkyl-O-; and (d) a halide, and wherein R is a C 1 -C 12 alkyl group, the process comprising contacting a compound of the formula SnX 2 , wherein X is chosen from fluoro, chloro, bromo, and iodo, with a molar excess of a compound of the formula Q- M, wherein M is chosen from Li, Na, and K, followed by combining with a compound of the formula R-X.
• the disclosure provides the process of the first aspect, wherein Q is phenyl, a group of the formula (C 1 -C 12 alkyl)2N-, or a group of the formula C 1 -C 12 alkyl- O- [0031]
• the disclosure provides the process of the first or second aspect, wherein M is Li.
• the disclosure provides the process of any of the first through third aspects, wherein R is a methyl, ethyl, propyl, isopropyl, n-butyl, t-butyl, sec-butyl, n-pentyl, isopentyl, or sec-pentyl group.
• the disclosure provides the process of any of the first through fourth aspects, wherein R is a cyclic C 1 -C 5 group.
• the disclosure provides the process of any one of the first through fourth aspects, wherein R is a vinyl group or an acetylenyl group.
• the disclosure provides the process of any one of the first through the fourth aspects, wherein R is further substituted with one or more halogen groups or ether groups.
• the disclosure provides the process of any of the first through fourth, aspects, wherein R is a perfluorinated C 1 -C 5 group.
• the disclosure provides the process of any of the first through fourth aspects, wherein R is an alkylether group having an alkyl portion that is a C 1 -C 5 group.
• R is an alkylether group having an alkyl portion that is a C 1 -C 5 group.
• the disclosure provides the process of any of the second through ninth aspects, wherein the molar excess of the compound of the formula Q-M is about 2.7 to about 3.3, based on the amount of the compound of the formula SnX 2 .
• the disclosure provides the process of any of the first through tenth aspects, herein Q is phenyl, X is chloro, R is isopropyl, and M is lithium.
• the disclosure provides the process of any of the first through eleventh aspects, wherein the compound of Formula (I) is wherein R 1 is C 1 -C 6 alkyl. [0041] In a thirteenth aspect, the disclosure provides the process of the twelfth aspect, wherein R 1 is isopropyl and X is chloro. [0042] In a fourteenth aspect, the disclosure provides a process of the first aspect, wherein Q is a halide.
• the disclosure provides a process of the fourteenth aspect, wherein the compound of the compound of formula Q-M and the compound of the formula SnX 2 are combined in a ratio of from 1.2:1 to 1:1.2
• the disclosure provides a process for preparing a compound of Formula (II): (II), wherein R is a C 1 -C 12 alkyl group and R 2 is a C 1 -C 12 alkyl group, wherein the process comprises (a) contacting a compound of the formula SnX 2 , wherein X is chosen from fluoro, chloro, bromo, and iodo, with a molar excess of a compound of the formula Q-M, wherein M is chosen from Li, Na, and K, and Q is phenyl, a group of the formula (C 1 -C 12 alkyl) 2 N-, or a group of the formula C 1 -C 12 alkyl-O-,
• the disclosure provides the process of the sixteenth aspect, comprising (a) contacting a compound of the formula SnX2, wherein X is chosen from fluoro, chloro, bromo, and iodo, with a molar excess of a compound of the formula Q-M, wherein M is chosen from Li, Na, and K, and Q is phenyl, a group of the formula (C 1 -C 12 alkyl) 2 N-, or a group of the formula C 1 -C 12 alkyl-O-, (b) adding a compound of the formula R-X, wherein R is a C 1 -C 12 alkyl group, to afford a compound of the formula (Q)3SnR, (c) reacting with a tin (IV) halide to afford an alkyl trihalotin, and (d) reacting with a compound of the formula (R 2 )2NH and with a compound of the formula (R 2 )2N-M
• the disclosure provides the process of the sixteenth aspect, comprising (a) contacting a compound of the formula SnX2, wherein X is chosen from fluoro, chloro, bromo, and iodo, with a compound of the formula Q-M, wherein M is chosen from Li, Na, and K, and Q is a halide, (b) adding a compound of the formula R-X, wherein R is a C 1 -C 12 alkyl group; to afford a compound of the formula (Q)3SnR, and (c) reacting with a compound of the formula (R 2 ) 2 NH and with a compound of the formula (R 2 )2N-M.
• the disclosure provides the process of any of the sixteenth through eighteenth aspects, wherein the compound of Formula (II) is .
• the disclosure provides a compound having the formula (Q) 3 SnR, wherein Q is phenyl and wherein R is selected from the group consisting of: a methyl, ethyl, propyl, isopropyl, n-butyl, t-butyl, sec-butyl, n-pentyl, isopentyl, or sec-pentyl group, a cyclic C 1 -C 5 group, a vinyl group or an acetylenyl group.

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• 2022
  • 2022-06-17 CN CN202280050405.9A patent/CN117651708A/zh active Pending
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